<button onclick="t1()">qqq</button>
<div id="1" class="cl1" style="display: none;">
<div class="hello">Привет</div>
<textarea>eee</textarea>
</div>
---
<script>
function t1() {
var obj = $("#1").clone().appendTo("#1").removeAttr("id").show();
obj.find("textarea").text("ppp");
}
</script>
<button id="clone">qqq</button>
<div id="1" class="cl1" style="display: none;">
<div class="hello">Привет</div>
<textarea>eee</textarea>
</div>
<div id="new">
</div>
$('#clone').click(function() {
var obj = $("#1").clone().removeAttr("id").css("display", "block");
obj.find("textarea").text("ppp");
$("#new").prepend(obj[0].outerHTML);
});